For the purposes of this specification, RSA is a public-key signature algorithm specified by PKCS #1. As a reversible public-key algorithm, it may also be used for encryption.
Source(s):
NIST SP 800-15
Rivest, Shamir, Adelman; an algorithm approved in [FIPS 186] for digital signatures and in [SP 800-56B] for key establishment.
Source(s):
NIST SP 800-57 Part 1 Rev. 4
[Superseded]
Algorithm developed by Rivest, Shamir and Adelman (allowed in FIPS 186-3 and specified in ANS X9.31 and PKCS #1).
Source(s):
NIST SP 800-89
A public-key algorithm that is used for key establishment and the generation and verification of digital signatures.
Source(s):
NIST SP 800-175B Rev. 1